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WO2018006950A1 - Réglage de distances d'impression - Google Patents

Réglage de distances d'impression Download PDF

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Publication number
WO2018006950A1
WO2018006950A1 PCT/EP2016/065885 EP2016065885W WO2018006950A1 WO 2018006950 A1 WO2018006950 A1 WO 2018006950A1 EP 2016065885 W EP2016065885 W EP 2016065885W WO 2018006950 A1 WO2018006950 A1 WO 2018006950A1
Authority
WO
WIPO (PCT)
Prior art keywords
printing
build material
distance
layer
agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2016/065885
Other languages
English (en)
Inventor
Fernando Juan
Sergi CULUBRET
Marius VALLES
Gerard MOSQUERA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Development Co LP filed Critical Hewlett Packard Development Co LP
Priority to PCT/EP2016/065885 priority Critical patent/WO2018006950A1/fr
Priority to US16/095,797 priority patent/US20190134912A1/en
Publication of WO2018006950A1 publication Critical patent/WO2018006950A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/245—Platforms or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

Definitions

  • Additive manufacturing techniques may generate a three-dimensional object on a layer-by-layer basis through the solidification of a build material.
  • build material is supplied in a layer-wise manner and a solidification method may include heating the layers of build material to cause melting in selected regions.
  • Fig. 1 schematically illustrates a method of setting a printing distance according to an example.
  • Fig. 2 schematically illustrates a 3D printer according to an example.
  • FIG. 3 schematically illustrates a printing sequence according to an example.
  • Fig. 4 schematically illustrates a method of printing according to an example.
  • a fusing agent is applied on a material layer where the particles are meant to fuse together.
  • a detailing agent is applied to modify fusing, and create fine detail and smooth surfaces.
  • the work area is subsequently exposed to fusing energy.
  • the process is then repeated until a part has been formed.
  • the working area may be a support platform or bed. Subsequently, the working area may be a previously formed layer of material.
  • the support platform may move down by a step, for example by a 0.1 mm step, to provide space and volume for a next layer of build material to be formed on top of the previously processed layer.
  • a recoater system may form the next layer of build material.
  • the recoater system may form a pile of build material at one side of the support platform and then spread this pile over the support platform using a blade or roller.
  • the recoater system may comprise a movable hopper to form the layer of build material as the hopper moves over the support platform.
  • the recoater system may define a recoating plane.
  • the recoating plane may be defined by the path of the lower generatrix of the roller or the lower edge of the blade and may match with the plane formed by the upper side of the new layer. This recoating plane is static because it is determined by the position of the recoater system guide.
  • an agent may be deposited on the formed layer of material in order to determine the geometry of the built parts layer by layer.
  • This agent is usually delivered by a moving device (or print carriage) which usually is describing a planar movement on a static plane determined by a linear or circular guide.
  • This plane may be called a printing plane, and it may be defined by the lower end of the moving device which is delivering the agent.
  • the moving device may comprise a printhead with nozzles. In such cases, the printing plane may be defined by the lower surface of the printhead or the nozzles.
  • the distance between the recoating plane and the printing plane may be called Powder to Printhead Space (PPS) if the formed layer of material is powder and the agent is delivered by a printhead.
  • PPS Powder to Printhead Space
  • PRS Printing to Recoating Space
  • PPS and PRS may be used indistinguishably.
  • the PPS distance is, by definition, a fixed distance. Therefore, printing systems using a fixed PPS rely on tight mechanical component tolerances of the guides of the recoater system, of the guides of the print carriage and of the structural elements between said guides. Furthermore, printing accuracy may be a factor of the distance from where the agent is delivered. A fixed PPS that relies on mechanical component tolerances may thus limit the printing accuracy. Furthermore, air turbulence may depend on the speed of the print carriage and the space between the print carriage that delivers the agent and the layer of build material. A fixed PPS may not allow control of air turbulence for different types of materials.
  • the agent deposition from the printing plane on the build material may not be accurate, for example as the drops may fall from a high distance.
  • an acceptable tolerance may be up to ⁇ 0.3mm. If the mechanical component tolerances produce a PPS higher than the acceptable range, i.e. higher than 2.6mm, the deposition may not be as accurate as expected.
  • agent depositing may be more accurate, but, as the fusing temperature of different build materials may not be the same, the temperature of the build material may be high, and it may affect the printhead when the printhead moves/is positioned over a hot print bed.
  • Fig. 1 schematically illustrates a flow diagram of a method of setting a printing distance in a 3D printing system according to an example.
  • a layer of build material may be formed below a printing plane. This layer may be formed by a recoater system. If this is a first layer of build material it may be formed on a support platform. Otherwise it may be formed on a previously formed layer of build material.
  • the formed layer of build material may be relatively displaced with respect to the printing plane.
  • relative displacing may comprise moving the print bed, and consequently the formed layer of build material, towards or away from the printing plane.
  • relative displacing may comprise moving the printing plane towards or away from the formed layer of build material. The relative displacing may continue until the distance between the formed layer of build material and the printing plane is a desired printing distance.
  • the desired printing distance may be a factor of characteristics of the build material or build material type and/or of a desired printing accuracy.
  • when relatively displacing it may be checked if the distance between the formed layer of build material and the printing plane is equal to the desired printing distance.
  • the relative displacing may continue. Otherwise, the relative displacing may stop.
  • an agent may be printed on the formed layer of build material. Other events may take place before or after agent printing, such as the preheating of the print bed. Furthermore, even if a desired printing distance is set, agent printing may not take place as a layer may remain unprinted. This may be the case when various 3D objects may be 3D printed using one print job.
  • FIG. 2 schematically illustrates a 3D printer according to an example.
  • 3D Printer 200 may comprise a support platform 205, a recoater system 210, a print carriage 215, a heating structure 220, a controller 225 and fusing element 217.
  • the heating structure and the fusing element may be included in one structure and provide pre-heating and fusing energy.
  • the fusing element 217 may be in the form of a fusing lamp and provide fusing energy. However, other types of fusing elements providing fusing energy may exist.
  • the controller may be coupled to and control the function of the printing platform 205, the recoater system 210, the print carriage 215, the heating structure 220 and the fusing element.
  • the controller 225 may control the recoater 210 to deposit a layer of build material 207 on the support platform 205. Then the controller 225 may instruct the support platform 205 to move with respect to, e.g. towards, the print carriage 215. Alternatively, the controller 225 may control the print carriage 215 to move the support platform 205 to a desired position so that the distance between the formed layer of build material 207 and the print carriage 215 is the desired printing distance. Then the controller may instruct the print carriage 215 to deposit a pattern of agent 209 on the formed layer of build material 207. When the agent 209 has been deposited, the controller may instruct the print carriage 215 to move away (e.g. to displace horizontally) and may then instruct the fusing element 217 to provide fusing energy to the patterned layer, i.e. to the build material that is partially covered by the agent 509.
  • the controller 225 may control the recoater 210 to deposit a layer of build material 207 on the support platform 205. Then the controller 225
  • Fig. 3A and 3B schematically illustrate a printing sequence according to an example.
  • a new layer of build material 307 may be formed on support platform 307 by recoater system 310.
  • the distance between the formed layer of build material 307 and the printing plane, defined as the plane of the print carriage 315 closer to the formed layer of build material 307 may be called PRS.
  • PRS the distance between the formed layer of build material 307 and the printing plane
  • the support platform 305 may be displaced relative to, e.g. towards, the printing plane until a new distance, the printing distance PD is reached.
  • the printing distance PD is reached.
  • Fig. 4 schematically illustrates a method of printing according to an example.
  • a 3D printer may start processing a print job.
  • a new layer of build material may be formed on a working area at a forming distance from a printing plane.
  • the formed layer of build material may be displaced from the forming distance towards the printing plane.
  • a pattern of agent may be printed on the displaced formed layer of build material.
  • the patterned layer of build material may be heated, i.e. fusing energy may be applied to the patterned layer, to cause portions of the build material on which fusing agent was printed to fuse.
  • the working area may be prepared for forming another layer of build material. Preparing the working area may comprise moving the working area to a new forming distance.
  • a check may be performed as to whether the print job has finished. If this is the case then the process may end. Otherwise the printing method may continue in block 410, with forming another layer of build material on top of the new working area which includes the fused layer of build material.
  • the example implementations discussed herein allow for a variable printing distance between the working area and the print carriage of a 3D printing system. For a certain working area, this may allow for higher agent deposition accuracy where the optimum printing distance is less than the fixed PPS distance, and for less air turbulence where the optimum printing distance is higher than the fixed PPS distance. Thus, they may improve the quality of a 3D printed object.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention porte sur des procédés et sur des dispositifs pour régler une distance d'impression dans un système d'impression 3D. Dans un exemple, le procédé consiste à former une couche de matériau de construction au-dessous d'un plan d'impression et à déplacer relativement la couche de matériau de construction formée par rapport au plan d'impression jusqu'à ce que la distance entre la couche de matériau de construction formée et le plan d'impression soit une distance d'impression souhaitée.
PCT/EP2016/065885 2016-07-05 2016-07-05 Réglage de distances d'impression Ceased WO2018006950A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2016/065885 WO2018006950A1 (fr) 2016-07-05 2016-07-05 Réglage de distances d'impression
US16/095,797 US20190134912A1 (en) 2016-07-05 2016-07-05 Setting printing distances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/065885 WO2018006950A1 (fr) 2016-07-05 2016-07-05 Réglage de distances d'impression

Publications (1)

Publication Number Publication Date
WO2018006950A1 true WO2018006950A1 (fr) 2018-01-11

Family

ID=56411599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/065885 Ceased WO2018006950A1 (fr) 2016-07-05 2016-07-05 Réglage de distances d'impression

Country Status (2)

Country Link
US (1) US20190134912A1 (fr)
WO (1) WO2018006950A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020237166A2 (fr) * 2019-05-23 2020-11-26 General Electric Company Ensembles actionneurs d'appareils de fabrication additive et leurs procédés d'utilisation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020093115A1 (en) * 2001-01-12 2002-07-18 Jang B. Z. Layer manufacturing method and apparatus using a programmable planar light source
US20100024725A1 (en) * 2005-05-19 2010-02-04 Canon Kabushiki Kaisha Method of forming structures using drop-on-demand printing
EP2727709A1 (fr) * 2012-10-31 2014-05-07 Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO Procédé et appareil pour fabriquer des produits tangibles par fabrication par couches
WO2016057034A1 (fr) * 2014-10-08 2016-04-14 Hewlett-Packard Development Company, L.P. Fabrication d'un objet tridimensionnel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020093115A1 (en) * 2001-01-12 2002-07-18 Jang B. Z. Layer manufacturing method and apparatus using a programmable planar light source
US20100024725A1 (en) * 2005-05-19 2010-02-04 Canon Kabushiki Kaisha Method of forming structures using drop-on-demand printing
EP2727709A1 (fr) * 2012-10-31 2014-05-07 Nederlandse Organisatie voor toegepast -natuurwetenschappelijk onderzoek TNO Procédé et appareil pour fabriquer des produits tangibles par fabrication par couches
WO2016057034A1 (fr) * 2014-10-08 2016-04-14 Hewlett-Packard Development Company, L.P. Fabrication d'un objet tridimensionnel

Also Published As

Publication number Publication date
US20190134912A1 (en) 2019-05-09

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